Description
Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer, and using encoded slashes (%2F) or backslashes (%5C) to access protected static resources. This is a distinct issue from CVE-2026-39852, which addressed only literal semicolon stripping. Versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2 contain a patch.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| quarkusio | quarkus | >= 3.36.0, < 3.36.3, >= 3.33.0, < 3.33.2.1, >= 3.27.0, < 3.27.4.1, < 3.20.6.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | apicurio-registry | 3.3.1-r0 | — |
| Wolfi rolling | keycloak-26.5 +2 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.quarkus:quarkus-vertx-http | < 3.20.6.2 | 3.20.6.2 | GHSA-qcxp-gm7m-4j5v |
| Maven | io.quarkus:quarkus-vertx-http | >= 3.21.0.CR1, < 3.27.4.1 | 3.27.4.1 | GHSA-qcxp-gm7m-4j5v |
| Maven | io.quarkus:quarkus-vertx-http | >= 3.28.0.CR1, < 3.33.2.1 | 3.33.2.1 | GHSA-qcxp-gm7m-4j5v |
| Maven | io.quarkus:quarkus-vertx-http | >= 3.34.0.CR1, < 3.36.3 | 3.36.3 | GHSA-qcxp-gm7m-4j5v |
| Maven | io.quarkus:quarkus-vertx-http | >= 3.37.0.CR1, < 3.37.0 | 3.37.0 | GHSA-qcxp-gm7m-4j5v |